Is there a way to add a texture like sandblasted to a surface?

carlos_berdeal

https://cad.onshape.com/documents/34944591984b89239fdb2e86/w/321d4261f660790811ec8633/e/da7fa5c0bfecb800ac3ef13d

I would like to add a texture like sand blasted or something similar to the underpart of the curved surface as this part will be printed in clear resin and lit from behind. Is there a way to add a rough look to it to diffuse the lighting?

S1mon

In my experience 3D printing usually can’t reproduce that scale of texture even if there was an easy way to model it in CAD.

This sounds more like a request to the model shop.

MichaelPascoe

@carlos_berdeal Yes, this is possible. Try either creating a small bump along the surface and patterning it via a face pattern.
Or you can use the Texture  custom feature to get a similar result. See the GIF below. For the demonstration, I used smaller pattern numbers, but you could do more columns and rows if you like.

@S1mon, you have to have a resin printer to get details like this.

https://cad.onshape.com/documents/e66e96a9b1a490be4afda12b/w/a5d674c25943590fd8ca661f/e/d39b6f47a93cc2e6565236c9?renderMode=0&uiState=63878008a4bf7e636abb720d

EvanReese

I'd use a different software to do this with displacement maps. Keyshot, Rhino, and Blender, and Solidworks can all do it. Onshape's built in rendering can also produce them, but I've not messed with it enough to know if you can export the mesh. You might even be able to get clever with the "fuzzy skin" setting in Cura if that's your slicer. Maybe you'd have luck controlling where the texture lands by breaking up your part into several parts that merge when printed because they're touching.

carlos_berdeal

@MichaelPascoe , This is perfect. Thank you for your help!

carlos_berdeal

@MichaelPascoe , Is there more info on face pattern?

carlos_berdeal

@MichaelPascoe , when I do the pattern every diamond becomes a separate part and I end up with 459 parts. Am I missing something?

https://cad.onshape.com/documents/34944591984b89239fdb2e86/w/321d4261f660790811ec8633/e/da7fa5c0bfecb800ac3ef13d

MichaelPascoe

@carlos_berdeal Sorry, it looks like the forums are not notifying me when my name is mentioned. There is an option at the top of the feature, set this to "Add" instead of "New". The parts may need to be pushed down into the face with a move configuration. If the parts are not all the way touching, the addition may fail.

carlos_berdeal

@MichaelPascoe , I had tried "add" it did not work. What do you mean by a "move configuration. Thanks in advance.

MichaelPascoe

@carlos_berdeal, there is a button within the Texture feature called "Add configuration".

• Within a texture configuration, in the "Move" tab, change the z to a small negative distance like -.1mm so that the parts are fully inside the main face so that the add boolean will work.
• Within a texture configuration, in the "Other" tab, change the border to "Trim parts at edges".

Like this: 
https://cad.onshape.com/documents/e66e96a9b1a490be4afda12b/w/a5d674c25943590fd8ca661f/e/d39b6f47a93cc2e6565236c9?renderMode=1&uiState=63ef79744235d23dc81a242d

kevin_mason558

@carlos_berdeal, 
is your model a sheet metal model? i have had the same issue using the diamond pattern for stair treads. my sheetmetal model wasnt finished so i could not boolean the pattern to it. and had 100s of parts.  
i tried pressing the finish sheet metal tab and then booleaned the parts to it  this seems to have worked for what i need